Rivet.



E. B. STIMPSON.

RIVET. APPLICATION FILED MAY 19,1909.

Patented Mar. 15,1910.

r m e J0 UNITE STAT PAENT FFTQE.

EDWIN BALL STIMPSON, OF NEW YORK, N. Y.

RIVET.

To all whom it may concern:

Be it known that I, EDWIN BALL STiMP- 1 son, a citlzen of the United States, and res1- In the drawings, Figure 1 is a vertical mid-section partly in elevation of a com.- plete rivet within my invention, Fig. 2 is the same omitting the ornamental covering and further diiiering in the respect that the head member 1s not pressed about the shank head to inseparably unite them, Fig. 3 is a vertical mid-section partly in elevation of the head member of Fig. 2, Fig. 4 is a top plan view of said head member, and Fig. 5 is a side elevation of the shank member of Fig.

escribing now my invention with special reference to the devices of the drawings, the complete rivet shown in Fig. 1 comprises three members, a shank member 1, a head member 2 and an ornamental covering 3. The head member 2 takes the form in the devices shown of a dome provided with a central depression 4 below its top, the bottom of which is perforated with an opening 5 through which to receive the shank of the member 1. The head member or dome will ordinarily be made of sheet metal pressed into the desired form. The shank member Specification of Letters Patent.

Application filed May 19, 1909.

Patented Mar. 15, 1910.

Serial No. 497,872.

1 may have a solid, tubular, bifurcated or other form of shank, receivable as shown through the opening in the bottom of the depression l. The shank member has a head 6, which is too large to pass through said opening and which is larger in crosssection below than above. Thus its sides taper as shown in Fig. 5, and when the sides of the depression or cup 4: are pressed invard against the tapered shank-head, the dome will be joined securely to the shank.

Having thus described my invention, what I claim is:

A rivet comprising a head consisting of a piece oi sheet-metal domed, said dome at its top having a cup -like depression, consisting of the top of the dome depressed into the concavity of the dome, the walls of said depression inclining outwardly toward the bottom of the depression, and said bottom having an opening therethrough; and a shank member having a head and stem, the head being contained in the cup depression, and having its sides inclining outwardly toward the base of the head, and engaged by the walls of the depression, and the stem of the shank member projecting through the hole in the bottom of the depression and thence out into the concavity of the dome.

itness my hand this 12th day of May 1909, at New York city, N. Y.

EDWIN BALL STIMPSON. lVitnesses E. \V. SCHENK, M. W. BEALES. 

